@keyframes bgMove {
  0% { background-position: 0% 50%; }
  100% { background-position: 100% 50%; }
}

body{
    text-align: center;
    margin: 0;
    padding: 0;
    font-family: 'Poppins', sans-serif;
    background: linear-gradient(-45deg, #1e3c72, #2a5298, #1e3c72, #2a5298);
    background-size: 400% 400%;
    animation: bgMove 15s ease infinite;
}

.developer-tag {
  position: fixed;
  top: 10px;
  left: 10px;
  font-family: 'Courier New', monospace;
  background-color: #333;
  color: #fff;
  padding: 4px 10px;
  border-radius: 6px;
  font-size: 13px;
  opacity: 0.8;
  z-index: 100;
}


h2 {
  font-size: 2rem;
  margin-top: 30px;
  font-weight: bold;
  color: #fff;
  text-shadow: 2px 2px 5px #000;
}

h3{
  font-size: 2rem;
  margin-top: 30px;
  font-weight: bold;
  color: #fff;
  text-shadow: 2px 2px 5px #000;
}

.btn{
  width: 180px;
  height: 180px;
  margin: 20px;
  border-radius: 20%;
  border: 10px solid #000;
  transition: transform 0.2s, box-shadow 0.3s;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.6);
}

.btn:active {
  transform: scale(0.95);
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.8) inset;
}

.btn-container{
    display: flex;
    justify-content: center;
}

.yellow{
    background-color: #f99b45;
}

.red {
    background-color: #d95980;
}

.green{
    background-color: #63aac0;
}

.purple{
    background-color: #819ff9;
}

.flash{
    background-color: white;
}

.userFlash{
    background-color: green;
}

.signature {
  position: fixed;
  bottom: 10px;
  right: 20px;
  font-family: 'Poppins', sans-serif;
  color: #ffffffb3;
  background: rgba(0, 0, 0, 0.5);
  padding: 6px 12px;
  border-radius: 10px;
  font-size: 14px;
  z-index: 100;
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.2);
}